Rand Paul threatens to filibuster long-term surveillance extension

Sen. Rand Paul (R-Ky.) is threatening to filibuster any “long-term extension” of a controversial intelligence program meant to allow the government to collect data on foreign targets without a warrant.

The program, which is set to expire at the end of this year if Congress doesn’t act, has drawn ire from civil liberties advocates because of the incidental collection on U.S. citizens that occurs under the law.

“I will actively oppose and filibuster any long term extension of warrantless searches of American citizens,” Paul tweeted on Wednesday.

What I don’t understand is what about the 4th Amendment don’t THE COURTS understand?